Call redirect from mobile device in IPBX

An apparatus, comprising:

• an interface circuit, configured to route data calls, as data communications via Internet protocol, between a wide-area communications network and a plurality of communication devices on an IP network, each of the plurality of communication devices being assigned a respective one of a plurality of extensions associated with the IP network, wherein the wide-area communications network includes at least one of a cellular network and a PSTN;
• and
• a processing circuit configured and arranged to:
• for each of the extensions, perform private branch exchange routing services, including:
• in response to an incoming data call to the extension, routing the data call via the IP network to one of the plurality of communication devices that is assigned the extension;
• and
• placing outgoing calls via the extension from said one of the plurality of communication devices that is assigned the extension;
• and
• via one or more of the plurality of extensions, place an outgoing data call from a particular one of a plurality of other communication devices not included in the plurality of communication devices and that is not part of the IP network, wherein the placement of the outgoing data call includes
• caching, in response to receiving a call notification indicating a source number of the particular one of a plurality of other communication devices and a destination number, the call notification for a period of time in a first database;
• providing, to the particular one of a plurality of other communication devices, a steering number representing a particular telephone number to direct one or more calls to the IP network from the cellular network or PSTN;
• and
• redirecting, in response to a first call using the steering number and via one of the networks from the source number indicated by the call notification that is cached in the first database, the first call to the destination number indicated in the call notification such that the first call appears as an outgoing call originating from the extension, wherein the outgoing call originates from the respective one of the plurality of other devices that is not included in the plurality of communication devices, wherein each of the plurality of communication devices includes communications circuitry for user-directed communications via use of the Internet.